New AMV System...New AMV System – Control System 4 1.1.2 Dial codes definition SW SW4 Parameter setting for night time silent operation Meaning After 6 hours of daytime peak temperature,

New AMV System

Control System

TECHNICAL SUPPORT DIVISION 2015.7

2 New AMV System – Control System

Content

1. Outdoor Unit and Indoor Unit PCB 3

2. Communication System 20

3. Controllers 24


1. Outdoor unit and indoor unit PCB

1.1 Outdoor unit main control board.

1.1.1 Outdoor unit PCB outlook

No. Content No. Content 1 Phase inspection port 18 SV5,SV6 four way valve control port

2 Discharge temp.( sensing port of inverter compressor, sensing port of NO.1and NO.2 fixed compressor) 19 SV1,SV2,SV3,SV4 control port (SV3 is reserved )

3 Terminal Communication between indoor and outdoor units 20 SV7,SV8 control port(SV7,SV8 is reserved)

4 Outdoor unit network and electric meter terminal 21 NO.1 EXV activation port

5 Control port of DC fan 1 22 NO.2 EXV activation port

6 Control port of DC fan 2 23 Power input of the No.2 transformer

7 ON/OFF signal input port for system Hi-pressure inspection 24 Power input of the No.1 transformer

8 ON/OFF signal input port for system low pressure inspection

25 Cap. of outdoor unit dial switch

9 Current inspection port of inverter and fixed compressors 26 Outdoor address switch

10 Inspection port for condenser coil temp.(black) 27 SW7, compressor restarting gap.

11 Inspection port for outdoor ambient temp(white) 28 SW8, night time silent operation mode and automatically assign address switch

12 Input port for system pressure inspection 29 SW9, mode selection dial switch

13 Communication ports among outdoor units 30 SW5, Outdoor fan static pressure switch

14 communication port between outdoor main board and the frequency conversion compressor module board

31 SW4, Night time silent operation selection switch

15 Power output of the No.2 transformer 32 Query button

16 Power output of the No.1 transformer 33 Constraint cooling button

17 Loading output terminal ─

3 4 5 6 7 8 9 10 11

12

13 14

15

16

17

18 19 20 21 22 23 24 25 26

27 28 29

30 31

32

33

2

1


1.1.2 Dial codes definition

SW4 Parameter setting for night time silent operation

Meaning

After 6 hours of daytime peak temperature, night time silent operation start, last for 8 hours, then return to normal operation.




Demonstration

(Default setting)

Remarks It is available only when user turn on the night time silent operation mode in SW8. Night time silent operation mode is default ON.

SW5 Outdoor fan ESP setting

Meaning Outdoor fan ESP is 0 Pa. Outdoor fan maximum ESP can be up to 85 Pa.

Demonstration

(Default setting)

SW4

SW12

SW5

SW10

SW9

SW13 SW6

SW7

SW11

SW8


SW6 Outdoor unit address setting

Meaning Master unit Slave unit Slave unit Slave unit

Demonstration

Poniting to 0

Poniting to1

Poniting to 2

Poniting to 3

Remarks Only 0,1,2,3 is available, address bigger than 3 will cause system failure.

SW7 1. System first start time setting 2. Snow-blowing function: when outdoor temperature is lower than 0°C and system is standby, every one

hour outdoor fan motor will turn on for 30 seconds.

Meaning

1. System can be start only after power on for 12 minutes.

2. Snow-blowing function is OFF.


2. Snow-blowing function is OFF.


2. Snow-blowing function is ON.


2. Snow-blowing function is ON.

Demonstration

1 2

ON

(Default setting)

1 2

ON

1 2

ON

1 2

ON

Remarks DO NOT change this setting without professional guidance.

SW8 Turn ON or OFF night time silent operation mode and automatically addressing

Meaning

1. Night time silent operation mode is ON

2. Automatically addressing is ON.

1. Night time silent operation mode is ON.

2. Automatically addressing is OFF.

Clear all auto assigned addresses of indoor units.

1. Night time silent operation mode is OFF.

2. Automatically addressing is ON.

1. Night time silent operation mode is OFF.

2. Automatically addressing is OFF.

Demonstration

(Default setting)

Remarks When automatically addressing is OFF, user need to set indoor unit address manual by indoor unit address setting controller.


SW9 Operation mode restriction setting

Meaning Heating priority Cooling priority First start mode

priority Heating only Cooling only

Demonstration

(Default setting)

Remarks When automatically addressing is OFF, user need to set indoor unit address manual by indoor unit address setting controller.

SW11 Outdoor unit PCB selector

Meaning 8HP 10HP 12HP 14HP 16HP

Demonstration

Poniting to 0

Poniting to1

Poniting to 2

Poniting to 3

Poniting to 4

Remarks Only 0,1,2,3,4 is available, address bigger than 4 will cause system failure.

SW12 PCB identification

Meaning For 380V-415/3PH/50Hz & 380V-415/3PH/60Hz For 280V-230V/3PH/60Hz

Demonstration

(Default setting)

Remarks DO NOT change this setting without professional guidance.

SW3: Forced cooling button

1) After pressing it once, all indoor units and outdoor units will start cooling, no matter what mode they are running on, no matter whether they are ON or OFF.

2) The forced cooling function is available for master unit only.

3) During forced cooling mode.

All indoor EXVs open to 300 pulses. All indoor fans are in high speed. All compressors are ON. All outdoor fan motors are OFF Outdoor EXVs opens to 480 pulses SV6 is ON

4) When program starts:

All the compressors are on Indoor fan is running at high speed

5) When the process is last for 1h or the button is pressed again, program will quit.

SW10: reserved, DO NOT change the default setting. SW13: reserved, DO NOT change the default setting.


1.1.3 Query procedures.

No. Display Content Remarks

/ - - Quantity of indoor units which can be communication with outdoor unit

Displays when system standby

/ - - Inverter compressor frequency Displays when system is running

1 1 - - Outdoor unit’s address 0(master unit),1(slave unit),2(slave unit),3(slave unit),4(slave unit)

2 2 - - Outdoor unit capacity 8(HP), 10(HP), 12(HP), 14(HP), 16(HP)

3 3 - - Outdoor unit quantity Only available for master unit

4 4 - - All outdoor units total capacity Total HP

5 5 - - All indoor units total capacity demand Only available for master unit

6 6 - - Total amended capacity demand Only available for master unit

7 7 - - Operation mode 0 (OFF or Fan only) 2 (Cooling) 3 (Heating) 4 (Forced cooling)

8 8 - - Outdoor unit actual capacity output Actual output HP

9 9- - Outdoor fan speed range 0,1,2,3,4,5,6,7,8,9

10 10 - - T2/T2B (indoor coil average temperature)

Display in actual value

11 11 - - T3 (outdoor coil temperature) Display in actual value

12 12 - - T4 (ambient temperature) Display in actual value

13 13 - - Inverter compressor discharge temperature

Display in actual value, normally it should be 75~85˚C

14 14 - - Fixed compressor 1 discharge temperature


15 15 - - Fixed compressor 2 discharge temperature


16 16 - - Inverter compressor current Display in actual value, normally it should be 3~10A

17 17 - - Fixed compressor 1 current Display in actual value, normally it should be 7~10A

18 18 - - Fixed compressor 2 current Display in actual value, normally it should be 7~10A

19 19 - - EXV opening Actual pulse = Display value ×8

20 20 - - Discharge pressure Actual value = Display value ×0.1MPa 2.7~3.1MPa in cooling, 2.2~2.7MPa in heating

21 21 - - Secondary current Display in actual value, system will stop when bigger than 14A

22 22 - - Secondary voltage Display in actual value, it should be 11~13

23 23 - - Priority operation mode 0: Heating first 1: cooling first 2: First start first 3: Heating only 4: Cooling only 5: Reserved 6: Reserved

24 24 - - Connected indoor unit quantity Indoor unit that is able to communicating to master outdoor unit

25 25 - - Last protection code or error code Display 00 if no protection code or error code.

26 26 - - / End

Note:

1) When operation of system lasts 1 hour and stays stability, press checkup button on PCB of outdoor master unit, query one by one and fill out the above table according to facts.

2) Description of display:

Normal display: when in standby mode, it indicates number of indoor units, when running, it indicates output percentage value of compressor.

Running mode: 0(OFF); 1(fan only); 2(Cooling); 3(Heating); 4(Forced cooling) Outdoor fan speed range: 0(OFF); 1~9──Speed increasing in turn. EXV opening: Actual pulse = Display value ×8. Number of indoor unit: indoor units which are capable of communicating with outdoor unit normally.


1.1.4 Outdoor error codes.

Code Malfunction or protection Remark

E0 Outdoor unit communication malfunction Only slave unit displays

E1 Phase sequence malfunction

E2 Communication between master outdoor unit and indoor units

E3 reserved

E4 Ambient temperature sensor malfunction

E5 reserved

E6 Outdoor heat exchanger temperature sensor malfunction

E7 reserved

E8 Outdoor unit address incorrect

E9 reserved

H0 Communication malfunction between DSP and 0547

H1 Communication malfunction between 0537 and 0547

H2 Outdoor unit quantities decreasing malfunction Only master unit displays

H3 Outdoor unit quantities increasing malfunction Only master unit displays

H4 There is 3 times P6 protection in 30 minutes. Repower on to clear the error code.



H7 Indoor unit quantities decreasing malfunction over 3 minutes Recover when indoor unit quantity is

correct

H8 Discharge pressure sensor error When discharge pressure is lower than

0.3MPa


P1 High pressure protection

P2 Low pressure protection

P3 Inverter compressor over current protection

P4 Discharge temperature sensor protection

P5 Heat exchanger temperature sensor protection

P6 Inverter module protection

P7 Fix compressor 1 current protection

P8 Fix compressor 2 current protection

P9 Fan module protection

L0 Inverter compressor malfunction

Error code after P6 protection

L1 DC generatrix low voltage protection

L2 DC generatrix high voltage protection

L3 reserved

L4 MCE malfunction/simultaneously/cycle loop

L5 Zero speed protection

L6 reserved

L7 Wrong phase protection

L8 Speed difference >15Hz protection between the front and the back clock

L9 Speed difference >15Hz protection between the real and the setting speed


1.2 Description of main control board of indoor unit.

1.2.1 There are two shapes of main control board that used to all types of indoor unit matching with New AMV outdoor unit.

1) Shape A

No. Content No. Content

1 Communication port of P Q E 9 EXV activation port

2 SW2 10 Transformer output port

3 Remote control port 11 Fan motor output interface

4 SW3 12 Transformer input port

5 Port for electric auxiliary heater 13 220V AC N interface

6 Port for display board and remote control receiver 14 220V AC L interface

7 SW1 15 Temperature sensor port

8 Download port 16 Remote control switch

1 4 2 3 5 6 7 8 9

10 11 12 13 14

15 16


2) Shape B

No. Content No. Content

1 Communication port of P Q E 11 Transformer input port

2 Port for display board and remote control receiver 12 SW1

3 EXV activation port 13 Remote control port

4 Stepper motor control port (a total of 4 port) 14 Remote control switch

5 Fan motor output interface 15 SW3

6 Pump output interface 16 SW2

7 Transformer output port 17 The water level switch interface

8 220V AC N interface 18 Temperature sensor port

9 220V AC L interface 19 Download port

10 Port for electric auxiliary heater ─

1 2 3 5 6 7 8

11 9

4 18

10 13 12 14 15 16 17

19


1.2.2 Error code & meanings

LED display LED light Meanings

FE TIMER and RUN both flash 4Hz, No address when indoor unit first time power on

E1 TIMER flashes at 4Hz Communication error between indoor and outdoor units

E2 RUN flashes 4Hz Temperature sensor T1 error

E3 RUN flashes 4Hz Temperature sensor T2 error

E4 RUN flashes 4Hz Temperature sensor T2B error

E5 ALARM flashes 0.5Hz, Outdoor unit error

E6 / Zero crossing detection error

E7 DEFOST flashes 0.5Hz, EEPROM error

E8 / Indoor fan motor error

E9 / Wired controller communication error

EE ALARM flashes 4Hz Water level alarm error

EF DEFOST flashes 4Hz Mode conflict


1.2.3 SW2, only available in heating mode.

Name Switch number 1,2 of SW2

Function Reserved

Setting

1 2 3 4 5 6 7 8

Default setting


Function Heating temperature compensation value selection. When temperature difference between setting

temperature and room temperature is higher than the setting value, indoor fan motor turns off. DO NOT change the default setting without professional guidance.

Setting

1 2 3 4 5 6 7 8

6 ˚C Default setting

1 2 3 4 5 6 7 8

2 ˚C

1 2 3 4 5 6 7 8

4 ˚C

1 2 3 4 5 6 7 8

8 ˚C

ON OFF

ON OFF

ON OFF

ON OFF



Function Temperature selection of turning off fan motor in anti-cold-wind-blow mode. When indoor heat

exchanger temperature is lower than the setting value, indoor fan motor turns off. DO NOT change the default setting without professional guidance.

Setting

1 2 3 4 5 6 7 8

15 ˚C Default setting

1 2 3 4 5 6 7 8

20 ˚C

1 2 3 4 5 6 7 8

24 ˚C

1 2 3 4 5 6 7 8

26 ˚C

ON OFF

ON OFF

ON OFF

ON OFF



Function

Indoor fan motor stopping gap selection in heating mode. When room temperature gets to (set point + temperature value in Switch number 3,4 of SW2), at this

moment indoor unit capacity requirement is 0, indoor fan motor turns off for 4 minutes ( this stopping duration time can be changed by below setting). After that indoor fan will run in low speed for 1 minute (this timing is fixed), if indoor unit capacity requirement is still 0, then indoor fan motor keeps off for 4 minutes, and then cycles.

DO NOT change the default setting without professional guidance.

Setting

1 2 3 4 5 6 7 8

4 minutes Default setting

1 2 3 4 5 6 7 8

8 minutes

1 2 3 4 5 6 7 8

12 minutes

1 2 3 4 5 6 7 8

16 minutes

1.2.4 SW8, reserved, leave it as default setting (both switches dial down).

ON OFF

ON OFF

ON OFF

ON OFF


1.3 Electric wiring installations

1.3.1 Highlights of electrical installation

1) Please separately design the special power of indoor units and outdoor units.

2) The power adopts special circuit, and installs circuit breaker and manual switch.

3) The indoor units’ power, circuit breaker and manual switch connecting to the same outdoor unit must be general. All

indoor units must be the same circuit, and must simultaneously on or off; otherwise, system life will seriously effect,

and appear the situation not to solve.

4) The communication line between indoor units and outdoor units please use 2-core shielded wiring, while don’t use

the multi core wiring without shielded affect, for the interference is reduced each other

5) Purchased wiring, parts and materials should be in compliance with the local and national regulations.

6) All field wiring construction should be finished by qualified electrician.

7) Air conditioning equipment should be grounded according to the relevant local and national electrical regulations.

8) Current leakage protection switch should be installed (select current leakage breaker in light of the 1.5-2 times of

total loading rated current.)

9) When connecting wiring and wire holder, use cable clamp to fix and make sure no exposure.

10) Refrigerant piping system and wiring system of indoor and outdoor unit belongs to the different system.

11) Do not connect the power wire to the terminal of signal wire.

12) When power wire is parallel with signal wire, put wires to their own wire tube and remain proper gap (the current

capacity of power wire is: 10A below 300mm, 50A below 500mm).

13) Voltage discrepancy of power wire terminal (side of power transformer) and end voltage (side of unit) should be less

than 2%. If its length could not be shortened, thicken the power wire. Voltage discrepancy between phases shall not

pass 2% rated value and Current discrepancy between highest and lowest phase should be less than 3% rated value.

1.3.2 Selection of wiring

1.3.2.1 The selection of wiring area shall in accordance with the requirements below:

1) Voltage lose of wire shall meet the requirement of terminal voltage for normal operation and startup.

2) The wiring current-carrying capacity determined by installed method and environment is not less than the largest

current of unit.

3) Conductor shall ensure the stability of movement and heating.

4) The conductor’s smallest sectional area should satisfy the requirement of mechanical strength.

5) When earth protection line (shortly called PE line) is made of material the same as phase line, the smallest sectional

area of PE line should be in accordance with the regulation below:

Sectional area of core to phase line (mm²) Smallest sectional area of PE line(mm²)

S≤16 S

16＜S≤35 16

S＞35 S/2

1.3.2.2 Distribution highlights of distribution wiring

1) When distributing wiring, select wirings with different colors for phase line, zero line and protection earth according

to relevant regulations.

2) The power wire and control wire of concealed engineering is prohibited to bind together with refrigerant piping. It is necessary to pass through wire tube and be distributed separately, and the gap between control line and power wire should be 500mm at least.


3) When distributing wiring by passing through pipe, the following should be paid attention to:

Metal wire tube could be used in indoor and outdoor, but it is not suitable to the place with acid – alkali

corrosion.

Plastic wire tube is generally used in indoor and place with corrosion, but it is not suitable to situation with

mechanical damage.

The wiring through pipe shall not be in the form with ends jointing. If there must be joint, connection box

should be installed at the corresponding place.

The wiring with different voltage should not pass through the same wire tube.

Total sectional area of wiring through wire tube shall not exceed 40% valid area of stuffing tube.

Fixing point of wire tube support shall follow the standard below:

Normal diameter of wire tube

(Mm)

Largest gap between fixed points of wire tube

Metal pipe Plastic pipe

15~20 1.5m 1m

25~32 2m 1.5m

40~50 2.5m 2m

1.3.2.3 Outdoor unit power wiring selection

1) Separate Power Supply without power facility.

Model Power supply

The shortest wiring diameter

(mm2) Manual switch (A)

Circuit breaker

≤20m ≤50m GND Capacity Fuse

AMV-V252W/ZR1-B

380-415V

3 Phase

50Hz

4×10 4×16 10 75 50 <100mA, 0.1sec

AMV-V280W/ZR1-B 4×10 4×16 10 75 50 <100mA, 0.1sec

AMV-V335W/ZR1-B 4×10 4×16 10 75 50 <100mA, 0.1sec

AMV-V400W/ZR1-B 4×16 4×25 16 100 70 <100mA, 0.1sec

AMV-V450W/ZR1-B 4×16 4×25 16 100 70 <100mA, 0.1sec

Note: The length in the table equals the value of power cord connecting outdoor units, indicating the condition that the

voltage dropping range is within 2%. If the length exceeds the above figure, please select the wire diameter according to

relevant standard.


2) With power facilities:

a) Case 1:

b) Case 2:

Note:

Select power wire for these five models separately according to relevant standard.

The wiring diameter and the length in the table indicate the condition that the voltage dropping range is

within 2%. If the length exceeds the above figure, please select the wire diameter according to relevant

standard.

Outdoor unitpower supply

Leakageprotector

Manualswitch

Outdoor unit

Outdoor unit

Outdoor unit

Outdoor unit

GND

GND

GND

GNDBranch box

LeakageprotectorManualswitch

380-415V 3N~ 50Hz

(a)

LeakageprotectorManualswitch

GND

Branch box

Outdoor unit

GNDOutdoor unit

GNDOutdoor unit

GNDOutdoor unit

GNDOutdoor unit

GNDOutdoor unit

(b)

(a)

Power facilities 1(with leakage protector)

Power facilities 2(with leakage protector)


3) Power wire selection

Power wiring includes the main wire (a) connecting to branch box and the wire (b) between branch box and power

facilities.

Please select the wire diameter according to the following requirement.

a) Diameter of main wire (a): depends on the total horse power (HP) of outdoor unit (See (5)).

Example:

In system: 8HP×1 unit+8HP×1 unit+10HP×1 unit

So totally 26HP → See (5) → size of wire is 25mm2 (within 20m)

b) Diameter of wire (b): depends on the number of combined outdoor unit.

If outdoor unit quantity ≤ 5, the wire (b) diameter selection is same as main wire (a) selection (See (5)).

If outdoor unit quantity > 5, there will be 2 electric control boxes, the wire (b) diameter selection depends

on the total horse power (HP) of outdoor units connecting to each electric control box (See (5)).

4) Select the capacity of manual switch and fuse of the branch box depends on the total horsepower (HP).

Total capacity(HP) Manual switch(A) Fuse(A) Total capacity(HP) Manual switch(A) Fuse(A)

8-12 75 50 29- 40 150 120

13-22 100 70 41- 48 200 150

23-28 150 100 49- 64 200 175

5) Reference table of the cable size for each capacity

Total

capacity

(HP)

Minimum wire diameter (mm2 ) Total

capacity

(HP)

Minimum wire diameter (mm2 )

Wire length ≤

20m 20m<Wire length≤ 50m Wire length ≤ 20m

20m<Wire length≤

50m

8 10 16 38 35 50

10 10 16 40 35 50

12 10 16 42 50 70

14 16 25 44 50 70

16 16 25 46 50 70

18 16 25 48 50 70

20 16 25 50 70 95

22 16 25 52 70 95

24 25 35 54 70 95

26 25 35 56 70 95

28 25 35 58 70 95

30 35 50 60 70 95

32 35 50 62 70 95

34 35 50 64 70 95

36 35 50 Remark:

The above selection is for reference.

For an actual electrical project, it should be considered that the cable layout, space between cable and surroundings,

etc.


1.5.5 Indoor unit power wiring selection

Note:

Set refrigerant piping system, signal wires between indoor-indoor unit, and that between outdoor-outdoor units into

one system.

Please do not put the signal wire and power wire in the same wire tube; keep distance between the two tubes.

(Current capacity of power supply: less than 10A--300mm, less than 50A--500mm.)

Make sure to set address of outdoor unit in case of parallel multi-outdoor units.


2. Communication system

2.1 Control system introduction

2.1.1 Connecting highlights of control line (RS-485 communication)

1. The control line should be shielded wire (wire diameter of the core wire≥0.75 mm2). Using other wiring shall create

signal interference, thus leading to error operation.

2. The shielded nets at the two sides of shielded wires are either grounded to the earth, or connected with each other

and jointed to the sheet metal along to the earth.

3. Control wire could not be bound together with refrigerant pipeline and power wire. When power wire and control wire

is distributed in parallel form, keep gap between them above 300mm so as to preventing signal interference.

4. Control wire could not form closed loop.

5. Control wire has polarity, so be careful when connecting.

2.1.2 Selection of control wire specification

The ordinary shielded wire includes:

Model Name

AVP Copper core PVC insulation shielded wire

AVP-105 Heat-resistant 105˚C PVC insulation shielded wire

RVP PVC insulation shielded flexible wire

RVP-105 Heat-resistant 105˚C PVC insulation shielded flexible wire

RVVP PVC insulation shielded PVC sheath flexible wire

RVVP1 PVC insulation entangled shielded PVC sheath flexible wire

2.1.3 Signal wire of indoor/outdoor units

Signal line shall adopt 2-core shielded wire with an area above 0.75 mm2, the 2 cores are connected to P,Q or H1,H2 terminals, the shielded layer are connected to E terminals.


L1 L2 L3 N

A B C N H1 H2 E P Q E A B C N A B C NH1 H2 E P Q E H1 H2 E P Q E

L N P Q E L N P Q E L N P Q E

Main power Supply (380V~415V/3PH/50Hz)

L1 L2 L3 N

Outdoor unit (Master) Outdoor unit (Slave) Outdoor unit (Slave)

Indoor unit Indoor unit Indoor unit

Sheilded layer

Powerdistributor

Communication wired between outdoor units

Communication wired between outdoor units

Sheilded layer

Indoor unit power cable

Outdoor unit power cable

Power distributor Power distributor Power distributor

Note:

The signal connecting line between outdoor units, indoor and outdoor units and indoor units has polarity. When

connecting, be careful to prevent error connection.

Signal line shall adopt 2-core shielded wire with an area above 0.75 mm2, the 2 cores are connected to P,Q or

H1,H2 terminals, the shielded layer are connected to E terminals.

Do not bind signal line and copper pipe together with belting.

Make sure that the shield metal layer should be grounded well indoor control box in order to prevent interference.

it’s forbidden to connect 200V or above high-volt live wire to the communication terminal.


2.1.4 Correct connection

Note: Shielded layer should be connected to steel pane of electrical control box.

2.1.5 Typical wrong connection

1) Loop connection of signal wire

2) Star connection of signal wire

a) Star connection of part signal wires

b) Star connection of all signal wires

3) Reverse connection of signal wire


a) Outdoor unit to indoor unit

b) Indoor unit to indoor unit


3. Controllers

3.1 Wireless remote controller

The model of the following remote controller is Lingtong common remote controller

3.1.1 Buttons and functions descriptions

1) MODE: Press the key to switch modes in order: AUTO →COOL →DRY →HEAT →FAN →AUTO

2) ON/OFF: Push this button to turn on the unit. Push the button again to turn off the unit.

3) FAN SPEED: This button is used for setting fan speed in the sequence that goes from AUTO, LOW, MED to HIGH, then back

to AUTO.

4) TIMER: Preset the time ON (start to operate) and the time OFF (turn off the operation).

5) TURBO: Reserved

6) LAMP: Reserved

7) CLEAN: Reserved

8) HOLD: Push this button to select hold mode and canceling hold mode.

9) SLEEP: Reserved

10) AIR FLOW: Reserved

11) SWING: Push this switch button to change the louver angle.

12) TEMP: Push the button to increase the indoor temperature setting or to adjust the TIMER in a clockwise direction.


3.1.2 LCD display indications:

1) AUTO,COOL,DAY,HEAT,FAN display

2) TEMPERATURE Display

3) SLEEP,LAMP,CLEAN,HOLD display

4) TIMER Display

3.2 Wired controller

3.2.1 The remote control board is responsible for the operational status of the system through the control button, through the

LCD to display the working status of the whole system, responsible for system control board for communication

3.2.2 Safety precautions:

1) Please read this safety precaution carefully, before installation. Do observe the following safety precautions, for they are

very important.

2) Confirm there is no abnormal phenomenon during test operation after installation completed, then hand the manual to the

user.

3) Installation must be conducted by professionals

4) Improper installation may cause electric shock or fire;

5) A random disassembly may cause abnormal operation or heating, which may result in fire.

6) Don't install it in a place where combustible gas easily leaks. Once combustible gas leaks and remains around Controller,

fire may be caused.


7) Wire must be suitable for the current of Controller. Otherwise electricity leakage or heating may be caused, which may

result in fire.

8) Wire must be suitable for controller, never bring outside force to bear on the terminal. Otherwise wire break or heating may

be caused, which may result in fire.

3.2.3 Installation

1) Do not install it in a place with oil, steam or sculpture gas, or else deform or malfunction may occur.

2) Wire controller installation notice:

Please refer to indoor unit installation manual for connecting between wire controller and indoor unit.

Circuit of wire controller is low voltage circuit. Never connect it with a standard 220V/380V circuit or put it into a same

wiring tube with the circuit.

The shield cable must be connected stable to the ground, or transmission may fail.

Do not attempt to extend the shield cable by cutting, if it is necessary, use Terminal Connection Block to connect.

After finishing connection, do not use Mugger to have the insulation check to the signal wire.

Note:

When the air conditioner needs wired controller, be sure adding a wire joint with 5 terminal named A, B, C, D, E in indoor

unit, and fixing a infrared emitter whose anode and cathode connecting with A and B near the receiver in the indoor unit switch

board, then connecting the terminal +5V, GND, run in the switch board to C, D, E respectively.


3.3 Address setting remote controller

SET

ENTER

CHECK0

SET

CHECK

3.3.1 User’s instructions

1) The operation method in the address set mode

Press the "SET" key to enter the address set mode, while the triangle on the right side of the "SET" key light, the

address parameters display.

Press a certain numeric pad which corresponding to the tens-digit of a desired setting address parameters, and the

tens-digit stop blinking immediately after pressing the key, indicating the completion of a set of tens-digit.

Press a certain numeric pad again which corresponding to the ones-digit of a desired setting address parameters,

and the ones-digit stop blinking immediately after pressing the key, indicating the completion of a set of ones-digit.

Confirm whether the address of current set is right, and press the " ENTER " key of remote controller to send the

address parameters to the receiving light panel or wired controller of indoor unit if it is right; if not, press the "SET"

key to reset address parameters.

2) The operation method of address query

Press the “CHECK" key and enter the address query mode, the triangle on the right side of "CHECK" key lights and

the address parameters blinking.

Set the remote controller towards receiving light panel or wired controller and then press the "ENTER" key to send

the request to the indoor unit, the plate or wired controller connected to indoor unit will display relevant address

parameters.

3.3.2 Notices

1) Address setting range of parameters must be 0 to 63; otherwise you can’t complete the parameters setting.

2) The methods and instructions of displaying indoor unit’s address

Ducted type indoor unit (with a wired controller): Execute address query operation or press the "CHECK" key of wired

controller once, the address display area of wired controller will indicate the current address parameters for 5

seconds and then return to normal display.

Wall-mounted indoor unit (with digital display board): Execute address query operation or press the "EMERGENT" key

of the indoor electrical control board, digital tube flashes to indicate the current address parameters for 10 seconds

and then return to normal display.

4-way cassette indoor unit, floor ceiling indoor unit (with 4 LED light board): Execute address query operation or press

and hold the "EMERGENT" key on the light board for 5 to 10 seconds, according to four different LED display status

(off, steady or flashing) and tweet buzzer to indicate the address parameters, the light board return to the normal

display and the buzzer resume normal working condition after 10 seconds or loosen the lamp board "EMERGENT".

SET key: Press this key to enter the

address setting mode.

CHECK key: Press this key to enter

the address query mode.

Enter key: Press this key can send the

set address or the address query

request to indoor unit.

Numeric key: Press these key can set

address parameters, it is available

only in the address setting mode.


3) The table of the corresponding relationship between LED type and numeric.

Based on the number and type of LED lights, address parameters is the sum of number the LED corresponding to according to

the table below; if the LED is flashing, accumulate and increase 16 is the address of indoor unit; if buzzer tweet at the same time,

accumulate and increase 32 is the address of the indoor unit.

LED Corresponding numeric

Running light 8

Defrosting lamp 4

Timing lamp 2

Warning light 1 4) The table of the corresponding relationship between address parameters range and the light board & buzzer:

Address 4 LED display Tweet buzzer

0~15 steady quiet

16~31 flashing quiet

32~47 steady sound

48~63 flashing sound

3.4 Centralized controller


Centralized controller is a remote wired controller that is used for controlling up to 64 indoor units. Moreover, we could create

our AC network with this device, including the PC central monitoring system and the BMS(Building Management System).

Memory function: It can record the running parameters (mode/fan speed/temp.) when using the controller to turn on

the indoor units, all the unit will work as the last setting.

Automatically record all setting info when lose power

RS485 communication protocol

Clear & bright LCD display screen,

Background light, more parameters display

Emergency ON/OFF control with simple dry contact input 3.4.1 System configure

1) With it, we could both centrally control the indoor units and bridge up to 64 indoor units to the PC monitoring software or

BMS. In fact, on the purpose of connecting the indoor units to the PC or the gateway, which makes the indoors units visible

and can be controlled, it is necessary.

2) All the indoor units and outdoor units are NEW AMV series, the topology of the network is as follows:

3) For the network topology, either of the connection below is available.

4) To establish a steady network the following should be noted The signal wire should be 2-core shielded wire and the wire should be provided by licensed electricians.


To make signal transmission steady and to protect the facilities, the signal transmission wires should not be near to

the power line. An interval of 300mm-500mm should exist between these two kinds of wires.

The signal wire of each network should be less than 1,200m.

The unit and the centralized controller should be connected hand-in-hand, which means that all the units’ same port

should be connected to a 2-core wire and the signal wire should be linear in topology. Or else, the facilities could not

work normally.

units’ same port should be connected to a 2-core wire and the signal wire should be linear in topology. Or else, the

facilities could not work normally.

5) Structure and composition

3.4.2 Wiring

1) These 2 ways are both available

1st way:

2nd way:


2) The Centralized controller wiring ports are as follows. X, Y, E terminals are used for outdoor master unit connections. E

joint is the common grounded terminal. P, Q terminals is reserved, no need to connect.

3) Below 2 switches are reserved, no need to change.

3.4.3 Power supply

It is uses a power adaptor to obtain power supply from the normal AC220V. Remember to connect the adaptor’s connector.

3.4.4 Functions

1. Power-on or reset

After power-on or reset of the centralized controller, at first, the liquid crystal display will have its all display sections

lighting up for 2 seconds, in 1 second after all sections have gone out, the system will enter the state of normal display,

and the centralized controller will be in the state of the homepage display to show the data of the first page and search

the air conditioners online in the network.

2. Centralized controller network area address (reserved)

The local computer or gateway can be connected to 16 centralized controllers at most for communications, and as an area


of an air conditioner network, each centralized controller can be distinguished by the centralized controller through

dialing to select the corresponding address, with the setting range of 0~ 15.

3. Status indicator

If any air conditioner online in the network has failed, or the centralized controller network itself has any fault, the

indicator will flash at the frequency of 2Hz.

If one or more air conditioners online in the network are running, including the timing operation, the indicator will light up

and if idle, the indicator will flash at the frequency of 1Hz.

4. Centralized controller lock (reserved)

On receiving the centralized controller locking command sent by the computer, the centralized controller will not allow for

switching on or off the air conditioner, as well as any mode setting operation, and at the same time a command will be

sent for remote control locking of all air conditioners within the centralized controller network. On receiving the unlocking

command, the centralized controller will be actuated to conduct switching-on/off operations, and simultaneously send a

command to disable the remote controller locking state of all air conditioners.

The remote control locking state can be locked or unlocked separately by any computer or the centralized controller.

After the monitor has its power cut off, the centralized controller locking state will be memorized, and will not be

eliminate after power recovery, unless an unlocking command is received.

5. Mode locking function (reserved)

On receiving the mode locking switching-on/off command, the command is forwarded to the air conditioner, and

simultaneously the centralized controller is up set allowing for selection of the startup mode set without any conflict to

the locked mode. After the command is received to disable the mode locking, the shutdown state can be free to choose

the startup mode.

3.4.5 Button operations

1) “CHECK” button

At any time, press the button, and then the operation mode is selected as querying the operation state of the air


conditioner. By default, the first online air conditioner will be queried, and you can use the “ADDR+” and “ADDR-” buttons

to change the parameter pages for query, or you can use the “PAGE UP” and “PAGE DOWN” buttons to change the

address for querying other online air conditioners.

2) “SET” button

In any other display mode, press this button to enter the setting mode with the default of setting a single unit to display

the first online air conditioner. While setting the operation mode, again press this button, and then select to operate all air

conditioners in the network, and repeatedly press this button to switch between single settings and full setting.

3) “MODE” button

While setting the operation mode, press this button, and then select to set the air conditioner operation mode as the

cooling mode, or heating mode, or air supply mode.

4) “SPEED” button

While setting the operation mode, press this button, and then select to set the running mode of the indoor fan as

automatic speed adjustment, high speed, medium speed, or low speed.

5) “TIMER” button

While setting the operation mode, press this button, and then select to set the timer function startup time of the air

conditioner; again press this button, and then select to set the timer function shutdown time of the air conditioner; and

again press this button to select to quit the timer setting and come back to the normal operation mode.

6) “SWING” button

While setting the operation mode, press this button, and then select to enable or disable the swing function, but if all air

conditioners currently selected have no swing function or no wind speed status, this button shall be invalid.

7) “PAGE UP” button

In the “CHECK” mode, once press this button, then it will display the operation status data of the previous air conditioner,

and if already at the first unit, then again press this button to display the data of the last unit. If this button is long pressed,

then the address will decrease progressively.

In the “SET” mode, once press this button, and if the operation targets a single unit, then select the previous air

conditioner with an online address number. If it is a full operation mode, this button shall be invalid.

8) “PAGE DOWN” button

In the “CHECK” mode, once press this button, then it will display the operation status data of the next air conditioner, and

if already at the last unit, then again press this button to display the data of the first unit. If this button is long pressed,

then the address will increase progressively.

Single unit All units

COOLING HEATING FAN ONLY OFF

AUTO LOW MED HIGH

TIMER ON TIMER OFF Normal operation


In the “SET” mode, once press this button, and if the operation targets a single unit, then select the next air conditioner

with an online address number. If it is a full operation mode, this button shall be invalid.

9) “ADDR+” button

On the homepage or in the “CHECK” mode, once press this button, then it will display the next page data of the current

page, but if already on the last page, then press this button once again to display the data of the first page.

In the “Setting” mode, once press this button, and if it is in the temperature conditioning mode, then the set temperature

will increase by 1 degree, but will stop increasing any more up to the highest temperature allowed to be set; if it is the

setting mode of timed starting or shutdown time, then select the next time setting, and if there is no timing, it will show

0.0, with the specific changes as follows:

10) “ADDR-” button

On the homepage or in the “CHECK” mode, once press this button, then it will display the previous page data of the

current page, but if already on the first page, then press this button once again to display the data of the last page.

In the “SET” mode, once press this button, and if it is in the temperature conditioning mode, then the set temperature will

decrease by 1 degree, but will stop decreasing any more up to the lowest temperature allowed to be set; if it is the setting

mode of timed starting or shutdown time, then select the previous time setting, and if there is no timing, it will show 0.0,

with the specific changes as follows:

11) “ON / OFF” button

At any time, once press this button to complete centralized ON/OFF operation on all air conditioners currently online

within the centralized controller network. If all air conditioners online in the network are at the OFF state, then press this

button to complete the startup operation; if it is currently on the page for mode setting with the startup mode,

temperature, wind speed and other parameters selected, then it will follow the selected parameters for startup; if there is

no mode currently selected, but shutdown, or it is currently at other display pages, then it shall be the default startup

mode, namely it will be started in the cooling mode and strong wind, with the set temperature of 24˚C and the swing

function enabled, the default startup mode will be locked according to the system mode or judged by other restriction

conditions; if there is any conflict, it will be automatically adjusted to the next mode without conflict; if all modes are

subject to conflicts, the startup will be impossible. If one or more air conditioners online in the network are at the startup

mode (including the timing process of timed startup or shutdown), then press the button to complete all shut down

operations.

12) `“LOCK” button

In the “Mode Setting” mode, press the “Remote Controller Lock” button to lock / unlock the remote controller of the air

conditioner currently selected, with the operation mode as follows: if you select “Single Unit Setting”, then only operate

the air conditioner of the current address; if the air conditioner is in the state of remote controller locking, then it will


send a command for unlocking, or send a command for locking. If you have not selected “Single Unit Setting”, then if one

or more air conditioners currently selected are in the state of remote controller locking, then it will send a command for

unlocking and if the air conditioners currently selected are all in an unlocking state, then it will send a command for

remote controller locking.

If the remote controller is in the locking state, the air conditioner does not receive the remote control signals from its

remote controller and wire controller, until unlocked and restored to its normal receiving.

If it is currently in the state of button locking, then press the locking button to unlock it, but if it is currently in the state of

unlocking, then press the button to lock it. If it is in the state of button locking, except for the unlocking operation, any

other button operation shall be invalid.

13) “CONFIRM” button

In the setting mode, press the button to have the mode status and auxiliary functions currently selected sent to the air

conditioner already selected.

After the air conditioner has already had its operation mode, auxiliary functions and status information selected, if the

“CONFIRM” button is not pressed, then the selected information will not be sent to the air conditioner, and the current

operation of the air conditioner will not be affected.

You do not need the “CONFIRM” button for the remote control locking and unlocking operations, but only need to directly

send the command information by pressing the locking button.

14) “RESET” button

Press the button at any time, and the centralized controller will reset, with the result identical to that after power-off

recovery.

3.4.6 Settings

1) The centralized controller can be set through the panel buttons.

a. Select the “Operation Settings” page, on which you can select the operation target as a single unit or all air

conditioners.

b. The operation mode can be selected by means of the “Mode” button, and normally, you can select such modes as

cooling, heating and air supply only.

c. When the address is first selected of an air conditioner to be set, if the air conditioner is running, then the default

operation mode will display and continue to maintain the setting as the current operating status, but you can select other

startup modes by the mode selector button, and use other buttons to select the temperature setting, wind speed and

timing, or select to shut down, and the mode selection is subject to mode conflicts and mode locking judgment. If the air

conditioner is in its shutdown state, the default should be the status of startup, and the default startup mode parameters

should be followed. If the default startup parameters have any conflict with the system line running state in mode, then

select the next mode free of conflicts. The startup can not be selected if all startup modes are subject to conflicts (For

example, when a single cooler is running in the heating mode).

d. The running fan speed can be selected through the wind speed button, and normally, you can select the automatic

wind, strong wind, medium wind and slow wind.

e. The temperature can be set through the temperature control button, with the temperature setting range of 17~30˚C.

f. You can select to set the timed startup or shutdown time by means of the timer button, and if the time is set as 0, it

indicates there is no timing operation. The first timing operation is set as 0 by default, namely, there is no timing.

g. Enable or disable the swing auxiliary function through the auxiliary function button.

h. Enter the setting page for the first time, and the default should be a single mode. If the air conditioner is in the state

of shutdown, the default startup parameters should be as follows: cooling mode, temperature set as 24˚C, high speed

and no timing, with the swing function enabled.


i. At any time, press the ON / OFF button to enable or disable all air conditioners currently online. As long as one of the

air conditioner online is running, including running in the state of delay shutdown, press the button, and all online air

conditioners will shut down. If all the air conditioners currently online are in the state of shutdown, then the startup

command shall be sent as follows: If the button is pressed in the mode of page setting, then follow the currently selected

mode, wind speed, set temperature, timing, auxiliary function and other options for startup. If the button is pressed

anytime else, with no selected mode setting data and no mode limit, the startup will be enabled by default following the

cooling mode, temperature set as 24˚C, strong wind and no timing, with the swing function enabled.

2) Settings through the computer (reserved)

After receipt of the mode information sent from the computer, if there is no mode or function conflict with the selected air

conditioner, then the mode setting information is forwarded to the network interface module and air conditioner, with the

setting results sent to the computer. If there is any conflict or the mode setting is not successful, then the fault

information will be transmitted to the upper computer.

3.4.7 Instructions

Before use of the centralized controller, please confirm that the centralized controlling system has its wiring; address

setting for the outdoor unit and centralized controller, and installation of computer monitoring software are in the correct

state.

1. Initial power-on, address setting and state display of the centralized controller

(1) Power-on or reset display state

After power-on or reset of the centralized controller, at first, the liquid crystal display will have its all display sections

lighting up for 2 seconds, in 1 second after all sections have gone out, the system will enter the state of normal display,

and the centralized controller will be in the state of the homepage display to show the data of the first page. In case of

initial power-on, you must be waiting for 15 seconds before button operations.

(2). Centralized controller network area address setting (reserved)

The local computer or gateway can be connected to 16 centralized controllers at most for

communications, and as an area of an air conditioner network, each centralized controller can

be distinguished by code dialing to select the address, with the setting range of 0~ 15.

(3). Status indicator

If any air conditioner online in the network has failed, or the centralized controller network

itself has any fault, the indicator will flash at the frequency of 2Hz.

If one or more air conditioners online in the network are running, including the timing

operation, the indicator will light up and if idle, the indicator will flash at the frequency of 1Hz.

2. Basic functions of the centralized controller

(1) Network control function of the centralized controller

Control and regulate the status, parameters and on/off state of the indoor units of all air conditioners in the network.

(2). Locking functions of the centralized controller and remote controller

On receiving the centralized controller locking command sent from the computer, the centralized controller does not

allow for air conditioner on/off and mode setting operations, and at the same time, all the air conditioners within the

centralized controller network will have their remote controllers locked. On receiving the unlocking command, the

centralized controller will be actuated to complete on/off operations, and simultaneously send a command to unlock the

remote controllers of all air conditioners.

Locking state of remote controllers: The locking or unlocking operations can be completed by an individual computer or

you can press the remote controller locking button to complete the locking or unlocking operations (Irrespective of a

single indoor unit or several indoor ones, if originally locked, then unlock it; if not locked, then lock it).


(3) Mode locked function (reserved)

On receiving the computer-mode ON/OFF locking command, the air conditioner will be locked to the fixed mode, at the

same time, the centralized controller only allows selection of the set starting mode without conflict with the locking mode,

and the machines with conflicts between the current operation mode and the locking mode will automatically shut down.

On receiving the command to disable the mode locking, you can be free to choose the starting mode in the shutdown

state.

3. Centralized controller query procedures

4 Centralized controller ON / OFF operation procedure

At any time, if the ON / OFF button is directly pressed, you can complete the centralized ON / OFF operations on all air

conditioners currently online within the centralized controller network to send the parameters and mode currently

displayed on the interface to the air conditioner; if necessary, some individual or all air conditioners can be started after

such operations as mode and parameter setting are completed. Please refer to the procedure as follows:

Standby or running

Press the “CHECK” button to inquiry the running state of the first air conditioner by default.

Press the “PAGE UP/DOWN” button to search the running state of other online air conditioners by default.

Press the “ADDR+” or “ADDR-” button to search the running state of other online air conditioners by default.

Press the “CHECK” button to exit.


Initial power-on, standby or already running

1. Press the “SET” button to enter the state for setting a single air conditioner; and repeatedly press the button to switch between “Single” and “All”. If the “Single” button is selected, press the “ADDR+” or “ADDR-” to select a specific unit.

2. Directly press the “PAGE UP” and “PAGE DOWN” buttons to adjust the temperature setting; or press the “Timing” button to enter the state for setting the air conditioner timed on / off or temperature, repeatedly press the button to switch among such three modes as timed startup, timed shutdown and temperature status; after entry into one of the setting states, press the “PAGE UP” and “PAGE DOWN” buttons to set the specific parameters.

3. Press the “SPEED” button to set the wind speed of the air conditioner fans, which can be switched among such four modes as automatic speed adjustment, high speed, medium speed, or low speed.

4. Press the “MODE” button to set the operation mode of the air conditioner, which can be switched among such three modes as cooling, heating and fan only.

5. Press the “LOCK” button to lock the remote controller

Press the “CONFIRM” button to determine the set contents and send to the corresponding air conditioner to start up according to the set contents or change the parameters and mode.

6. Press the “MODE” button to select shutdown.

Press the “CONFIRM” button (continuously) to shut down.


In this operation process, Steps 1, 2, 3, 4, 5 and 6 can be performed separately, but not necessarily in order; after a certain

step is set, you can press the “CONFIRM” button to continuously set the next step and then press the “CONFIRM” button;

or you can set all the contents or only set a certain step, and then press the “CONFIRM” button. Note: Once you press the

“CONFIRM” button, the machine will soon receive the instruction information and operate as required.

3.4.8 2.4.1.7 Important notice

a. Selection of the mode button - In time of a single-unit operation, if the air conditioner is only a cooler, then the heating

mode can not be selected; in time of the full-control mode, as long as there is only one set of cooling and heating air

conditioner, then you can select the heating mode, but if there are some single coolers among the air conditioners already

selected, it will prompt function conflicts, but the mode setting operations will not be limited.

b. If the set time is 0, it indicates that there is no timing operation. In time of first entry into the timing operation, the

default time is 0, namely, no timing.

c. Swing auxiliary function – Only if the auxiliary function button selection is enabled or disabled, and as long as one of

all air conditioners selected for operations can support the selected auxiliary functions, then this function can be enabled.

Otherwise, it can not be enabled. As long as one of all air conditioners selected for operations can not support the

auxiliary functions selected as “Enabled”, then it will prompt function conflicts, but the mode setting operations will not

be limited.

d. In time of first entry into the setting page, the default mode is a single unit, if the air conditioner is idle, it will follow

the cooling mode by default for startup - The temperature is set as 24˚C, featuring strong wind and no timing, with the

swing function enabled.

e. At any time, press the ON / OFF button to enable or disable all air conditioners currently online. As long as one of the

air conditioner online is running, including running in the state of delay shutdown, press the button, and all online air

conditioners will shut down. If all the air conditioners currently online are in the state of shutdown, then the startup

command shall be sent as follows: If the button is pressed in the mode of page setting, then follow the currently selected

mode, wind speed, set temperature, timing, auxiliary function and other options for startup. If the button is pressed

anytime else, with no selected mode setting data, the startup will be enabled by default following the cooling mode,

temperature set as 24˚C, strong wind and no timing, with the swing function enabled or according to the contents

displayed on the current page.

5.3.5. Communication to the upper computer (reserved)

Once receiving the data sent to the local address from the upper computer, it will enter the network control state, but if

not for 1 consecutive minute, it will exit from the network control state. If the data communication has produced frame

errors or data check errors, then it will result in communication fault between the centralized controller and the

computer, with the fault code of “03#”, and the fault will be removed after the communication has become normal or

exited from the network control state.


3.4.9 Table for faults and protection codes

Code Fault Contents Code Protection Contents

Air conditioner faults and protection

EF Other faults PF Other protections

EE Water level detection fault PE Reserved

ED Outdoor unit fault protection PD Reserved

EC Fresh fault (reserved) PC Reserved

EB Frequency conversion module protection (reserved)

PB Reserved

EA Compressor overflow (four times) (reserved) PA Reserved

E9 Main board and display board communication fault

P9 Reserved

E8 Wind speed detection runaway (reserved) P8 Compressor overflow

E7 EEPROM error (reserved) P7 Power supply overvoltage and under voltage protection

E6 Zero crossing detection fault (reserved) P6 Exhaust low pressure protection

E5 T3 sensor fault or T4 or digital compressor discharge temperature sensor fault (reserved)

P5 Exhaust high pressure protection

E4 T2B sensor fault P4 Exhaust pipe temperature protection

E3 T2A sensor fault P3 Compressor temperature protection

E2 T1 sensor fault P2 Condenser high temperature protection

E1 Indoor and outdoor communication fault (reserved)

P1 Anti-cold wind or defrosting protection

E0 Phase sequence error or phase missing (reserved)

P0 Evaporator temperature protection

Network fault

03# Communication fault between the centralized controller and the computer (gateway)

02# Communication fault between the centralized controller and the function module

01# Communication fault between the centralized controller and the network interface module

00# Communication fault between the network interface module and the main control panel

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